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UNTTE I? STATES FATNT n FTQ.

FREDERICK S. BARNARD, OF NEW YORK, N. Y.

MODE OF INCREASING, REDUCING, AND COIvIlJIUNICATING IVIOTION INMACHINERY TO BE USED AS A SUBSTITUTE FOR COG-GEARING.

Speccaton of Letters Patent No. 1,318, dated September 10, 1839.

To all "t0/wm t may conce/rn Be it known that I, FREDERICK S. BAR- NARD,of the city, county, and State of New York, have invented a new andImproved Mode of Increasing and Reducing Motion in Machinery, which isdescribed as follows, reference being had to the annexed drawings of thesame, making part of this specication.

Figure l is a perspective view of the machine in a horizontal position.It may, however, be placed in a vertical position. Fig. 2 represents thearrangement of the wheels, studs and axle one of the outside or endplates of the cylinder being removed for that purpose. Fig. 3 representsone of the end plates of the cylinder and segment slots and sliding boxtherein; Fig. 4f, wheel without shoulder and one of the sliding boxesand screw; Fig. 5, the other outside or end plate; Fig. 6, circular rimwith arms attached to the cylinder for turning it, the wheels and theaxle; Fig. 7, side elevation of the whole machine; Fig. S, edge view ofone of the large wheels; Fig. 9, edge view of the small wheel; Fig. 10,one of the studs; Fig. 11, the axle detached.

Similar letters refer to similar parts in the severa-1 figures.

The nature of my invention consists in surrounding a small shaft orspindle A by three wheels B', B, B, two of which B and B are of an equaldiameter, the other B less. These three wheels bear on the shaft A, andare placed as near together as may be without coming in contact. Theyrun between two stationary plates H, 7L, and are encircled by a metalliccylinder or ring E. The space X between the ring and shaft and betweenthe small and one of the larger wheels, of course varies in width inproportion to the variation of the diameter of the last above mentionedwheels. Therefore by moving the larger wheel B (the axle of which runsin sliding boxes L, secured with fastening screws in the guide openingsin the plates) on a curved line w passing through the space and towardthe axis of the smaller wheel B (the boxes of which, together with thoseof the wheel B', are in the plates I-I, 7L, and stationary). I therebyobtain any required bearing or pressure equally against the shaft A, andring E, after moving or wedging the wheel B in said space X so as tosecure said bearing or pressure. Then the set screws in the two slidingIboxes L are made use of to keep the wheel in its place. The plates H,7L, are connected by three studs c, o, c, within, one in each spacebetween the wheels, so as not to interfere with the wheels. One of theplates H has two flanges N. It may be furnished with four the better tofasten it to any place where the gearing is to be put in motion, theshaft or spindle A, passing through plate H, in an opening K, largerthan the diameter of the shaft which of course has no bearing againstsaid plate, but bears on the peripheries of the three wheels B, B, andB, and occasionally touching the inside of plate 7L, by its flanged end,which is made convex. On the outer center of this plate is a stud oraxle P, fixed at right angles with the face of the plate and parallelwith the axles of the wheels or rollers and shaft. 0n this fixed stud isa hub Q with four arms G screwed to the side of the ring. The arms andhub being on the extreme outside of plate 7L, and being iixed to thering E revolve with it. There is a band wheel M on the shaft A, thepropelling power being applied to this shaft A when the motion is to bereduced to obtain power and to the hub Q, when the motion is to beincreased. The flanges on the inner periphery of the cylinder are forkeeping it from the plates, the wheels having shoulders for keeping themin their proper places between the plates. The center shaft A, likewisehas a flange on it near the extremity thereof which is between thewheels and the plate z., for preventing it from drawing out and is madeconvex where it occasionally touches the plate for reducing friction.

The circular form of this machine and the compact arrangement of itsparts renders it a very useful and cheap gearing for propelling variouskinds of machinery.

I do not claim as my invention the substitution of the friction of thesurfaces of revolving bodies as a substitute for cog gearing, as this, Iam aware has long been known, but not employed in a manner similar tomine.

I therefore claim as 1ny invention- B", and inner periphery of the ringE, by The combination of the ring E, Wheels shifting the position of oneof the Wheels B, B, B, and B, and the spindle A arin the manner hereindescribed.

ranged as herein described as a substitute FREDERICK S. BARNARD. 5 forcog gearing, and also claim the method Witnesses:

of increasing the pressure against the sur- B. K. MORSELL,

feces of the spindle A, Wheels B', B, `and JOHN A. HALL.

